{"id":58372,"date":"2025-07-08T06:59:05","date_gmt":"2025-07-08T06:59:05","guid":{"rendered":""},"modified":"2025-10-07T18:13:44","modified_gmt":"2025-10-08T00:13:44","slug":"cve-2025-30375-type-confusion-vulnerability-in-microsoft-office-excel-leading-to-unauthorized-code-execution","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-30375-type-confusion-vulnerability-in-microsoft-office-excel-leading-to-unauthorized-code-execution\/","title":{"rendered":"<strong>CVE-2025-30375: Type Confusion Vulnerability in Microsoft Office Excel Leading to Unauthorized Code Execution<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>Security vulnerabilities are a significant concern in the rapidly evolving world of technology. One such vulnerability that has come to light recently is the CVE-2025-30375. This particular <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29977-use-after-free-vulnerability-in-microsoft-office-excel\/\"  data-wpil-monitor-id=\"64980\">vulnerability affects Microsoft Office<\/a> Excel, a widely used spreadsheet program found in numerous businesses and industries around the globe. The threat lies in a type confusion error, allowing an unauthorized attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29331-critical-remote-code-execution-vulnerability-in-mhsanaei-3x-ui\/\"  data-wpil-monitor-id=\"64970\">execute code<\/a> locally. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7695-privilege-escalation-vulnerability-in-dataverse-integration-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"69620\">vulnerability is not just a potential threat to the integrity<\/a> of data but can also result in system compromise.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-30375<br \/>\nSeverity: High (7.8 CVSS score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: Unauthorized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53002-remote-code-execution-vulnerability-in-llama-factory\/\"  data-wpil-monitor-id=\"65184\">code execution<\/a> leading to potential system compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3749454031\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47168-use-after-free-vulnerability-in-microsoft-office-word-allowing-unauthorized-code-execution\/\"  data-wpil-monitor-id=\"73059\">Microsoft Office<\/a> Excel | All versions prior to the patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of a type confusion error in <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47170-use-after-free-vulnerability-in-microsoft-office-word\/\"  data-wpil-monitor-id=\"75404\">Microsoft Office<\/a> Excel. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48815-windows-ssdp-service-type-confusion-vulnerability\/\"  data-wpil-monitor-id=\"78148\">Type confusion<\/a>, often also referred to as type casting, is an error that occurs when a piece of code is not properly checking the type of an object that it is handling. In this case, an attacker can manipulate <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6573-critical-kernel-software-vulnerability-leading-to-potential-data-leakage\/\"  data-wpil-monitor-id=\"80156\">data that the software<\/a> misinterprets, leading to an unexpected behavior. An attacker with knowledge of this vulnerability can craft a malicious Excel document, which, when opened by the victim, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5310-remote-code-execution-vulnerability-in-dover-fueling-solutions-progauge-maglink-lx-consoles\/\"  data-wpil-monitor-id=\"65518\">executes the attacker&#8217;s code<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1042516436\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>Imagine an attacker creates a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80681\">malicious Excel document with embedded VBA macro code<\/a>. When the victim opens the document and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55730-escaping-vulnerability-in-xwiki-remote-macros-enabling-remote-code-execution\/\"  data-wpil-monitor-id=\"89283\">enables macros<\/a> (perhaps due to a convincing social engineering trick), the code runs.<br \/>\nHere is a simplified conceptual example of what the VBA <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55728-xwiki-remote-macros-remote-code-execution-vulnerability\/\"  data-wpil-monitor-id=\"89273\">macro code<\/a> might look like:<\/p>\n<pre><code class=\"\" data-line=\"\">Sub Auto_Open()\nDim buffer As String\nbuffer = Space(1024) &#039; Create a string with 1024 spaces\nCopyMemory ByVal VarPtr(buffer), ByVal &amp;H12345678, 4 &#039; Copy data to buffer causing type confusion\nExecute(buffer) &#039; Execute the malicious code\nEnd Sub<\/code><\/pre>\n<p>Remember, this is just a conceptual example and the actual exploit <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28993-code-injection-vulnerability-in-jose-content-no-cache\/\"  data-wpil-monitor-id=\"65452\">code would be more complex and specific to the vulnerable<\/a> application&#8217;s internals.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To mitigate the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52709-high-risk-deserialization-of-untrusted-data-vulnerability-in-everest-forms\/\"  data-wpil-monitor-id=\"65242\">risk associated with this vulnerability<\/a>, users are advised to apply the vendor-issued patch as soon as it becomes available. Until then, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50738-memos-application-vulnerability-allows-for-unauthorized-user-information-disclosure\/\"  data-wpil-monitor-id=\"69619\">users can use a Web Application<\/a> Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation strategy. Always be wary of unsolicited documents and do not enable macros unless it is absolutely necessary and the source is trusted.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Security vulnerabilities are a significant concern in the rapidly evolving world of technology. One such vulnerability that has come to light recently is the CVE-2025-30375. This particular vulnerability affects Microsoft Office Excel, a widely used spreadsheet program found in numerous businesses and industries around the globe. The threat lies in a type confusion error, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[82],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-58372","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58372","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=58372"}],"version-history":[{"count":14,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58372\/revisions"}],"predecessor-version":[{"id":82119,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58372\/revisions\/82119"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=58372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=58372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=58372"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=58372"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=58372"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=58372"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=58372"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=58372"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=58372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}